A good title is brief and clear.

"'Miracle': European Space Agency reconnects with lost spacecraft" is long.

"'Miracle': ESA reconnects with lost spacecraft" is opaque.

The first four words of the article are, "The European Space Agency..."

ESA is one of the largest space agencies in the world. There’s nothing opaque about calling it ESA especially in a title. We wouldn’t use initialisms if everything had to be expanded all the time.